Hair serum is a product used for the treatment of rough and dry hair especially. As lionesse hair serum, most of them usually contain silicon contents along with the amino acids and ceramides. It is said to act as a mask on the scalp of your hair, the silicon contents help in the treatment of frizzy hair and makes them smooth and shiny. But, before buying the hair serums, you should know the reviews about it before hand and check they don’t contain any harmful chemicals in them as, there are number of hair serums available in the market.